/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.tajo.validation;

import java.util.Collection;

public class ConstraintViolationException extends RuntimeException {
  
  private static final long serialVersionUID = 1L;
  
  private final Collection<ConstraintViolation> violations;

  public ConstraintViolationException(Collection<ConstraintViolation> violations) {
    this.violations = violations;
  }

  public Collection<ConstraintViolation> getViolations() {
    return violations;
  }

  @Override
  public String getMessage() {
    if (violations != null) {
      StringBuilder stringBuilder = new StringBuilder("ConstraintViolationException [");
      int elemIdx = 1;
      int elemCount = violations.size();
      for (ConstraintViolation violation: violations) {
        stringBuilder.append(violation.getMessage());
        if (elemIdx++ > elemCount) {
          stringBuilder.append(',');
        }
      }
      stringBuilder.append(']');
      return stringBuilder.toString();
    } else {
      return super.getMessage();
    }
  }
  
}
